AArch64MCTargetDesc.cpp
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//===-- AArch64MCTargetDesc.cpp - AArch64 Target Descriptions ---*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file provides AArch64 specific target descriptions.
//
//===----------------------------------------------------------------------===//
#include "AArch64MCTargetDesc.h"
#include "AArch64ELFStreamer.h"
#include "AArch64MCAsmInfo.h"
#include "AArch64WinCOFFStreamer.h"
#include "MCTargetDesc/AArch64AddressingModes.h"
#include "MCTargetDesc/AArch64InstPrinter.h"
#include "TargetInfo/AArch64TargetInfo.h"
#include "llvm/DebugInfo/CodeView/CodeView.h"
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCInstrAnalysis.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
#define GET_INSTRINFO_MC_DESC
#define GET_INSTRINFO_MC_HELPERS
#include "AArch64GenInstrInfo.inc"
#define GET_SUBTARGETINFO_MC_DESC
#include "AArch64GenSubtargetInfo.inc"
#define GET_REGINFO_MC_DESC
#include "AArch64GenRegisterInfo.inc"
static MCInstrInfo *createAArch64MCInstrInfo() {
MCInstrInfo *X = new MCInstrInfo();
InitAArch64MCInstrInfo(X);
return X;
}
static MCSubtargetInfo *
createAArch64MCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
if (CPU.empty())
CPU = "generic";
return createAArch64MCSubtargetInfoImpl(TT, CPU, FS);
}
void AArch64_MC::initLLVMToCVRegMapping(MCRegisterInfo *MRI) {
// Mapping from CodeView to MC register id.
static const struct {
codeview::RegisterId CVReg;
MCPhysReg Reg;
} RegMap[] = {
{codeview::RegisterId::ARM64_W0, AArch64::W0},
{codeview::RegisterId::ARM64_W1, AArch64::W1},
{codeview::RegisterId::ARM64_W2, AArch64::W2},
{codeview::RegisterId::ARM64_W3, AArch64::W3},
{codeview::RegisterId::ARM64_W4, AArch64::W4},
{codeview::RegisterId::ARM64_W5, AArch64::W5},
{codeview::RegisterId::ARM64_W6, AArch64::W6},
{codeview::RegisterId::ARM64_W7, AArch64::W7},
{codeview::RegisterId::ARM64_W8, AArch64::W8},
{codeview::RegisterId::ARM64_W9, AArch64::W9},
{codeview::RegisterId::ARM64_W10, AArch64::W10},
{codeview::RegisterId::ARM64_W11, AArch64::W11},
{codeview::RegisterId::ARM64_W12, AArch64::W12},
{codeview::RegisterId::ARM64_W13, AArch64::W13},
{codeview::RegisterId::ARM64_W14, AArch64::W14},
{codeview::RegisterId::ARM64_W15, AArch64::W15},
{codeview::RegisterId::ARM64_W16, AArch64::W16},
{codeview::RegisterId::ARM64_W17, AArch64::W17},
{codeview::RegisterId::ARM64_W18, AArch64::W18},
{codeview::RegisterId::ARM64_W19, AArch64::W19},
{codeview::RegisterId::ARM64_W20, AArch64::W20},
{codeview::RegisterId::ARM64_W21, AArch64::W21},
{codeview::RegisterId::ARM64_W22, AArch64::W22},
{codeview::RegisterId::ARM64_W23, AArch64::W23},
{codeview::RegisterId::ARM64_W24, AArch64::W24},
{codeview::RegisterId::ARM64_W25, AArch64::W25},
{codeview::RegisterId::ARM64_W26, AArch64::W26},
{codeview::RegisterId::ARM64_W27, AArch64::W27},
{codeview::RegisterId::ARM64_W28, AArch64::W28},
{codeview::RegisterId::ARM64_W29, AArch64::W29},
{codeview::RegisterId::ARM64_W30, AArch64::W30},
{codeview::RegisterId::ARM64_WZR, AArch64::WZR},
{codeview::RegisterId::ARM64_X0, AArch64::X0},
{codeview::RegisterId::ARM64_X1, AArch64::X1},
{codeview::RegisterId::ARM64_X2, AArch64::X2},
{codeview::RegisterId::ARM64_X3, AArch64::X3},
{codeview::RegisterId::ARM64_X4, AArch64::X4},
{codeview::RegisterId::ARM64_X5, AArch64::X5},
{codeview::RegisterId::ARM64_X6, AArch64::X6},
{codeview::RegisterId::ARM64_X7, AArch64::X7},
{codeview::RegisterId::ARM64_X8, AArch64::X8},
{codeview::RegisterId::ARM64_X9, AArch64::X9},
{codeview::RegisterId::ARM64_X10, AArch64::X10},
{codeview::RegisterId::ARM64_X11, AArch64::X11},
{codeview::RegisterId::ARM64_X12, AArch64::X12},
{codeview::RegisterId::ARM64_X13, AArch64::X13},
{codeview::RegisterId::ARM64_X14, AArch64::X14},
{codeview::RegisterId::ARM64_X15, AArch64::X15},
{codeview::RegisterId::ARM64_X16, AArch64::X16},
{codeview::RegisterId::ARM64_X17, AArch64::X17},
{codeview::RegisterId::ARM64_X18, AArch64::X18},
{codeview::RegisterId::ARM64_X19, AArch64::X19},
{codeview::RegisterId::ARM64_X20, AArch64::X20},
{codeview::RegisterId::ARM64_X21, AArch64::X21},
{codeview::RegisterId::ARM64_X22, AArch64::X22},
{codeview::RegisterId::ARM64_X23, AArch64::X23},
{codeview::RegisterId::ARM64_X24, AArch64::X24},
{codeview::RegisterId::ARM64_X25, AArch64::X25},
{codeview::RegisterId::ARM64_X26, AArch64::X26},
{codeview::RegisterId::ARM64_X27, AArch64::X27},
{codeview::RegisterId::ARM64_X28, AArch64::X28},
{codeview::RegisterId::ARM64_FP, AArch64::FP},
{codeview::RegisterId::ARM64_LR, AArch64::LR},
{codeview::RegisterId::ARM64_SP, AArch64::SP},
{codeview::RegisterId::ARM64_ZR, AArch64::XZR},
{codeview::RegisterId::ARM64_NZCV, AArch64::NZCV},
{codeview::RegisterId::ARM64_S0, AArch64::S0},
{codeview::RegisterId::ARM64_S1, AArch64::S1},
{codeview::RegisterId::ARM64_S2, AArch64::S2},
{codeview::RegisterId::ARM64_S3, AArch64::S3},
{codeview::RegisterId::ARM64_S4, AArch64::S4},
{codeview::RegisterId::ARM64_S5, AArch64::S5},
{codeview::RegisterId::ARM64_S6, AArch64::S6},
{codeview::RegisterId::ARM64_S7, AArch64::S7},
{codeview::RegisterId::ARM64_S8, AArch64::S8},
{codeview::RegisterId::ARM64_S9, AArch64::S9},
{codeview::RegisterId::ARM64_S10, AArch64::S10},
{codeview::RegisterId::ARM64_S11, AArch64::S11},
{codeview::RegisterId::ARM64_S12, AArch64::S12},
{codeview::RegisterId::ARM64_S13, AArch64::S13},
{codeview::RegisterId::ARM64_S14, AArch64::S14},
{codeview::RegisterId::ARM64_S15, AArch64::S15},
{codeview::RegisterId::ARM64_S16, AArch64::S16},
{codeview::RegisterId::ARM64_S17, AArch64::S17},
{codeview::RegisterId::ARM64_S18, AArch64::S18},
{codeview::RegisterId::ARM64_S19, AArch64::S19},
{codeview::RegisterId::ARM64_S20, AArch64::S20},
{codeview::RegisterId::ARM64_S21, AArch64::S21},
{codeview::RegisterId::ARM64_S22, AArch64::S22},
{codeview::RegisterId::ARM64_S23, AArch64::S23},
{codeview::RegisterId::ARM64_S24, AArch64::S24},
{codeview::RegisterId::ARM64_S25, AArch64::S25},
{codeview::RegisterId::ARM64_S26, AArch64::S26},
{codeview::RegisterId::ARM64_S27, AArch64::S27},
{codeview::RegisterId::ARM64_S28, AArch64::S28},
{codeview::RegisterId::ARM64_S29, AArch64::S29},
{codeview::RegisterId::ARM64_S30, AArch64::S30},
{codeview::RegisterId::ARM64_S31, AArch64::S31},
{codeview::RegisterId::ARM64_D0, AArch64::D0},
{codeview::RegisterId::ARM64_D1, AArch64::D1},
{codeview::RegisterId::ARM64_D2, AArch64::D2},
{codeview::RegisterId::ARM64_D3, AArch64::D3},
{codeview::RegisterId::ARM64_D4, AArch64::D4},
{codeview::RegisterId::ARM64_D5, AArch64::D5},
{codeview::RegisterId::ARM64_D6, AArch64::D6},
{codeview::RegisterId::ARM64_D7, AArch64::D7},
{codeview::RegisterId::ARM64_D8, AArch64::D8},
{codeview::RegisterId::ARM64_D9, AArch64::D9},
{codeview::RegisterId::ARM64_D10, AArch64::D10},
{codeview::RegisterId::ARM64_D11, AArch64::D11},
{codeview::RegisterId::ARM64_D12, AArch64::D12},
{codeview::RegisterId::ARM64_D13, AArch64::D13},
{codeview::RegisterId::ARM64_D14, AArch64::D14},
{codeview::RegisterId::ARM64_D15, AArch64::D15},
{codeview::RegisterId::ARM64_D16, AArch64::D16},
{codeview::RegisterId::ARM64_D17, AArch64::D17},
{codeview::RegisterId::ARM64_D18, AArch64::D18},
{codeview::RegisterId::ARM64_D19, AArch64::D19},
{codeview::RegisterId::ARM64_D20, AArch64::D20},
{codeview::RegisterId::ARM64_D21, AArch64::D21},
{codeview::RegisterId::ARM64_D22, AArch64::D22},
{codeview::RegisterId::ARM64_D23, AArch64::D23},
{codeview::RegisterId::ARM64_D24, AArch64::D24},
{codeview::RegisterId::ARM64_D25, AArch64::D25},
{codeview::RegisterId::ARM64_D26, AArch64::D26},
{codeview::RegisterId::ARM64_D27, AArch64::D27},
{codeview::RegisterId::ARM64_D28, AArch64::D28},
{codeview::RegisterId::ARM64_D29, AArch64::D29},
{codeview::RegisterId::ARM64_D30, AArch64::D30},
{codeview::RegisterId::ARM64_D31, AArch64::D31},
{codeview::RegisterId::ARM64_Q0, AArch64::Q0},
{codeview::RegisterId::ARM64_Q1, AArch64::Q1},
{codeview::RegisterId::ARM64_Q2, AArch64::Q2},
{codeview::RegisterId::ARM64_Q3, AArch64::Q3},
{codeview::RegisterId::ARM64_Q4, AArch64::Q4},
{codeview::RegisterId::ARM64_Q5, AArch64::Q5},
{codeview::RegisterId::ARM64_Q6, AArch64::Q6},
{codeview::RegisterId::ARM64_Q7, AArch64::Q7},
{codeview::RegisterId::ARM64_Q8, AArch64::Q8},
{codeview::RegisterId::ARM64_Q9, AArch64::Q9},
{codeview::RegisterId::ARM64_Q10, AArch64::Q10},
{codeview::RegisterId::ARM64_Q11, AArch64::Q11},
{codeview::RegisterId::ARM64_Q12, AArch64::Q12},
{codeview::RegisterId::ARM64_Q13, AArch64::Q13},
{codeview::RegisterId::ARM64_Q14, AArch64::Q14},
{codeview::RegisterId::ARM64_Q15, AArch64::Q15},
{codeview::RegisterId::ARM64_Q16, AArch64::Q16},
{codeview::RegisterId::ARM64_Q17, AArch64::Q17},
{codeview::RegisterId::ARM64_Q18, AArch64::Q18},
{codeview::RegisterId::ARM64_Q19, AArch64::Q19},
{codeview::RegisterId::ARM64_Q20, AArch64::Q20},
{codeview::RegisterId::ARM64_Q21, AArch64::Q21},
{codeview::RegisterId::ARM64_Q22, AArch64::Q22},
{codeview::RegisterId::ARM64_Q23, AArch64::Q23},
{codeview::RegisterId::ARM64_Q24, AArch64::Q24},
{codeview::RegisterId::ARM64_Q25, AArch64::Q25},
{codeview::RegisterId::ARM64_Q26, AArch64::Q26},
{codeview::RegisterId::ARM64_Q27, AArch64::Q27},
{codeview::RegisterId::ARM64_Q28, AArch64::Q28},
{codeview::RegisterId::ARM64_Q29, AArch64::Q29},
{codeview::RegisterId::ARM64_Q30, AArch64::Q30},
{codeview::RegisterId::ARM64_Q31, AArch64::Q31},
};
for (unsigned I = 0; I < array_lengthof(RegMap); ++I)
MRI->mapLLVMRegToCVReg(RegMap[I].Reg, static_cast<int>(RegMap[I].CVReg));
}
static MCRegisterInfo *createAArch64MCRegisterInfo(const Triple &Triple) {
MCRegisterInfo *X = new MCRegisterInfo();
InitAArch64MCRegisterInfo(X, AArch64::LR);
AArch64_MC::initLLVMToCVRegMapping(X);
return X;
}
static MCAsmInfo *createAArch64MCAsmInfo(const MCRegisterInfo &MRI,
const Triple &TheTriple,
const MCTargetOptions &Options) {
MCAsmInfo *MAI;
if (TheTriple.isOSBinFormatMachO())
MAI = new AArch64MCAsmInfoDarwin(TheTriple.getArch() == Triple::aarch64_32);
else if (TheTriple.isWindowsMSVCEnvironment())
MAI = new AArch64MCAsmInfoMicrosoftCOFF();
else if (TheTriple.isOSBinFormatCOFF())
MAI = new AArch64MCAsmInfoGNUCOFF();
else {
assert(TheTriple.isOSBinFormatELF() && "Invalid target");
MAI = new AArch64MCAsmInfoELF(TheTriple);
}
// Initial state of the frame pointer is SP.
unsigned Reg = MRI.getDwarfRegNum(AArch64::SP, true);
MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(nullptr, Reg, 0);
MAI->addInitialFrameState(Inst);
return MAI;
}
static MCInstPrinter *createAArch64MCInstPrinter(const Triple &T,
unsigned SyntaxVariant,
const MCAsmInfo &MAI,
const MCInstrInfo &MII,
const MCRegisterInfo &MRI) {
if (SyntaxVariant == 0)
return new AArch64InstPrinter(MAI, MII, MRI);
if (SyntaxVariant == 1)
return new AArch64AppleInstPrinter(MAI, MII, MRI);
return nullptr;
}
static MCStreamer *createELFStreamer(const Triple &T, MCContext &Ctx,
std::unique_ptr<MCAsmBackend> &&TAB,
std::unique_ptr<MCObjectWriter> &&OW,
std::unique_ptr<MCCodeEmitter> &&Emitter,
bool RelaxAll) {
return createAArch64ELFStreamer(Ctx, std::move(TAB), std::move(OW),
std::move(Emitter), RelaxAll);
}
static MCStreamer *createMachOStreamer(MCContext &Ctx,
std::unique_ptr<MCAsmBackend> &&TAB,
std::unique_ptr<MCObjectWriter> &&OW,
std::unique_ptr<MCCodeEmitter> &&Emitter,
bool RelaxAll,
bool DWARFMustBeAtTheEnd) {
return createMachOStreamer(Ctx, std::move(TAB), std::move(OW),
std::move(Emitter), RelaxAll, DWARFMustBeAtTheEnd,
/*LabelSections*/ true);
}
static MCStreamer *
createWinCOFFStreamer(MCContext &Ctx, std::unique_ptr<MCAsmBackend> &&TAB,
std::unique_ptr<MCObjectWriter> &&OW,
std::unique_ptr<MCCodeEmitter> &&Emitter, bool RelaxAll,
bool IncrementalLinkerCompatible) {
return createAArch64WinCOFFStreamer(Ctx, std::move(TAB), std::move(OW),
std::move(Emitter), RelaxAll,
IncrementalLinkerCompatible);
}
namespace {
class AArch64MCInstrAnalysis : public MCInstrAnalysis {
public:
AArch64MCInstrAnalysis(const MCInstrInfo *Info) : MCInstrAnalysis(Info) {}
bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
uint64_t &Target) const override {
// Search for a PC-relative argument.
// This will handle instructions like bcc (where the first argument is the
// condition code) and cbz (where it is a register).
const auto &Desc = Info->get(Inst.getOpcode());
for (unsigned i = 0, e = Inst.getNumOperands(); i != e; i++) {
if (Desc.OpInfo[i].OperandType == MCOI::OPERAND_PCREL) {
int64_t Imm = Inst.getOperand(i).getImm() * 4;
Target = Addr + Imm;
return true;
}
}
return false;
}
std::vector<std::pair<uint64_t, uint64_t>>
findPltEntries(uint64_t PltSectionVA, ArrayRef<uint8_t> PltContents,
uint64_t GotPltSectionVA,
const Triple &TargetTriple) const override {
// Do a lightweight parsing of PLT entries.
std::vector<std::pair<uint64_t, uint64_t>> Result;
for (uint64_t Byte = 0, End = PltContents.size(); Byte + 7 < End;
Byte += 4) {
uint32_t Insn = support::endian::read32le(PltContents.data() + Byte);
uint64_t Off = 0;
// Check for optional bti c that prefixes adrp in BTI enabled entries
if (Insn == 0xd503245f) {
Off = 4;
Insn = support::endian::read32le(PltContents.data() + Byte + Off);
}
// Check for adrp.
if ((Insn & 0x9f000000) != 0x90000000)
continue;
Off += 4;
uint64_t Imm = (((PltSectionVA + Byte) >> 12) << 12) +
(((Insn >> 29) & 3) << 12) + (((Insn >> 5) & 0x3ffff) << 14);
uint32_t Insn2 =
support::endian::read32le(PltContents.data() + Byte + Off);
// Check for: ldr Xt, [Xn, #pimm].
if (Insn2 >> 22 == 0x3e5) {
Imm += ((Insn2 >> 10) & 0xfff) << 3;
Result.push_back(std::make_pair(PltSectionVA + Byte, Imm));
Byte += 4;
}
}
return Result;
}
};
} // end anonymous namespace
static MCInstrAnalysis *createAArch64InstrAnalysis(const MCInstrInfo *Info) {
return new AArch64MCInstrAnalysis(Info);
}
// Force static initialization.
extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAArch64TargetMC() {
for (Target *T : {&getTheAArch64leTarget(), &getTheAArch64beTarget(),
&getTheAArch64_32Target(), &getTheARM64Target(),
&getTheARM64_32Target()}) {
// Register the MC asm info.
RegisterMCAsmInfoFn X(*T, createAArch64MCAsmInfo);
// Register the MC instruction info.
TargetRegistry::RegisterMCInstrInfo(*T, createAArch64MCInstrInfo);
// Register the MC register info.
TargetRegistry::RegisterMCRegInfo(*T, createAArch64MCRegisterInfo);
// Register the MC subtarget info.
TargetRegistry::RegisterMCSubtargetInfo(*T, createAArch64MCSubtargetInfo);
// Register the MC instruction analyzer.
TargetRegistry::RegisterMCInstrAnalysis(*T, createAArch64InstrAnalysis);
// Register the MC Code Emitter
TargetRegistry::RegisterMCCodeEmitter(*T, createAArch64MCCodeEmitter);
// Register the obj streamers.
TargetRegistry::RegisterELFStreamer(*T, createELFStreamer);
TargetRegistry::RegisterMachOStreamer(*T, createMachOStreamer);
TargetRegistry::RegisterCOFFStreamer(*T, createWinCOFFStreamer);
// Register the obj target streamer.
TargetRegistry::RegisterObjectTargetStreamer(
*T, createAArch64ObjectTargetStreamer);
// Register the asm streamer.
TargetRegistry::RegisterAsmTargetStreamer(*T,
createAArch64AsmTargetStreamer);
// Register the MCInstPrinter.
TargetRegistry::RegisterMCInstPrinter(*T, createAArch64MCInstPrinter);
}
// Register the asm backend.
for (Target *T : {&getTheAArch64leTarget(), &getTheAArch64_32Target(),
&getTheARM64Target(), &getTheARM64_32Target()})
TargetRegistry::RegisterMCAsmBackend(*T, createAArch64leAsmBackend);
TargetRegistry::RegisterMCAsmBackend(getTheAArch64beTarget(),
createAArch64beAsmBackend);
}